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My 2003 Le Mans is running terrible and I'm looking into setting up the bike according the different procedures found in the Technical Topics section of this forum. While connecting the GuzziDiag software and having a good look at the faded letterings on the ECU I discovered that my bike doesn't have it's original ECU fitted. I'm not sure what ECU the bike came with but it now has a IAW 15RC PF3C from a California MY03 CAT fitted while I don't have a lambda probe on my bike. While all the different GuzziDiag screens and functions seem to work I'm having trouble setting the CO trim level. After increasing the -128 (yes, -128 !) value with the + button and clicking the Finish button nothing happens. The screen doesn't change. I can only press the - or + or Finish buttons. This made me wonder if the CO level can be changed on a 15RC CAT ECU while my bike doesn't have a lambda probe. Any ideas about what I can do to change the CO level with the 15RC ECU without the lambda probe ? Can or should I fool the ECU in thinking there's a lambda probe present ? Thx ! Walter

Hello all! I am seeing something curious with my '01 V11 Sport (IAW 15M ECU) and I doubt I am the first one to see it. Maybe someone here can shed some light on my issue. Quick rundown: I was experiencing the all too common hiccups in the machine between 2K and 3K RPM. I have already set valve lash, reset the TPS zero voltage and balance the throttle bodies. Things are MUCH better now but there is room for improvement and I want to adjust the CO trim next as the bike appears to be just a touch lean at low engine speeds. My fundamental issue is that I cannot adjust my CO trim with GuzziDiag. I either can't meet the 60 degree minimum engine temperature (more on that below) per GuzziDiag or I get a message that states "the active diagnostics module could not be started" (that quote is from memory so is not likely 100% accurate). Regarding my engine temperature: My engine temperature indication via GuzziDiag is different when the engine is running versus when it is not running. For example, if I am indicating 100 degrees C with the engine running, when I shut the engine down (as required to adjust the CO trim in Guzzi Diag) the temp indication goes to 40 degrees C. If I let it warm to 125 degrees C running, the non-running indication drops to 52. This creates a condition where I cannot simultaneously meet the minimum engine temp of 60 degrees AND have the engine not running. I think this may be the root of my trouble but I am currently out of ideas to resolve it. - I have purchased another engine oil temp sensor thinking it may be a faulty sensor with no change in behavior - I read Meinolf's comment about the sensor and I am using thermal paste in the base of my plastic sensor receiver to correct any contact issues I may have although it is pretty unlikely that would explain a different running vs non-running indication With the above temperature indication "issue" in mind, the furthest along I can get is to run the engine to get it above 60 degrees then select CO trim while running. GuzziDiag then tells me to turn the engine off which results in disconnecting communications with the ECU. After disconnecting and reconnecting communications I hit "Start" in the CO trim window and I then get the dialog "the active diagnostics module could not be started". I suspect it is because on reconnecting with the ECU GuzziDiag recognizes my engine temperature is now too low. I can't be completely sure of this though. I guess my first main question to the group is: does your engine temperature indicate differently when running versus non-running? If the answer is "no" then I may be correct about my feeling that this is my problem to solve. If you say "yes" then I need to head in another direction to correct this! Any feedback, thoughts or ideas are appreciated! Jim